card: Make printing of key information more flexible.

* tools/card-tool-misc.c: New.
* tools/card-tool.h: Rewored data structures for key infos.
* tools/gpg-card-tool.c: Ditto.
* tools/card-call-scd.c: Ditto.
--

Note that this also changes the way the key information is printed.
Formerly we printed it like:

  Signature key ....: <openpgp-fingerprint>
        created ....: <timestamp>
        keygrip ... : <keygrip>

now we do:

  Signature key ....: <keygrip>
        fingerprint : <openpgp-fingerprint>
        created ....: <timestamp>

This is because a keygrip is always available but a fingerprint and
the creation date are properties of an OpenPGP card.  A standard way
of listing keys is better than one depending on the type of card.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 44 insertions, 0 deletions

diff --git a/tools/card-tool-misc.c b/tools/card-tool-misc.c
new file mode 100644
index 000000000..0f5fcc0a0
--- /dev/null
+++ b/tools/card-tool-misc.c
@@ -0,0 +1,44 @@
+/* card-tool-misc.c - Helper functions for gpg-card-tool
+ * Copyright (C) 2019 g10 Code GmbH
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "../common/util.h"
+#include "../common/i18n.h"
+#include "../common/openpgpdefs.h"
+#include "card-tool.h"
+
+/* Return the key info object for the key KEYREF.  If it is not found
+ * NULL is returned.  */
+key_info_t
+find_kinfo (card_info_t info, const char *keyref)
+{
+  key_info_t kinfo;
+
+  for (kinfo = info->kinfo; kinfo; kinfo = kinfo->next)
+    if (!strcmp (kinfo->keyref, keyref))
+      return kinfo;
+  return NULL;
+}